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A Frequency-Dependent Significance Test for Parsimony

By Mike Steel, Peter J. Lockhart and David Pennyt

Abstract

We describe techniques for assessing evolutionary trees constructed by the parsimony criteria, when sequences exhibit irregular base compositions. In particular, we extend a recently described frequencydependent significance test to handle any number of taxa and describe a modification of the Kishino Hasegawa sites test. These modifications are useful for detecting historical signals beyond those patterns which arise purely from irregular base compositions between the compared sequences. We apply the test to extend our earlier studies on chloroplast origins using 168 rDNA sequences, where a failure to compensate for irregular base compositions between the compared sequences provides statistically significant support fo

Year: 1994
OAI identifier: oai:CiteSeerX.psu:10.1.1.353.5650
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